Existence of periodic solutions for two types of second-order nonlinear neutral integro-differential equations with infinite distributed mixed-delays. Advances in the Theory of Nonlinear Analysis and its Application, [S. l.], v. 2, n. 4, p. 184–194, 2018. Disponível em: https://atnaea.org/index.php/journal/article/view/41.. Acesso em: 3 may. 2026.